Python has math library and has many functions regarding it. One such function is isnan(). This method is used to check whether a given parameter is a valid number or not.
Syntax : math.isnan(x) Parameters : x [Required] : It is any valid python data type or any number. Returns: Return type is boolean. -> Returns False if the given parameter is any number(positive or negative) -> Returns True if given parameter is NaN (Not a Number).
Time Complexity: O(1)
Auxiliary Space: O(1)
Code #1:
python3
# Python3 code to demonstrate # the working of isnan() import math # initializing the value test_int = 4test_neg_int = -3test_float = 0.00# checking isnan() values # with different numbersprint (math.isnan(test_int))print (math.isnan(test_neg_int))print (math.isnan(test_float)) |
Output:
False False False
Code #2:
python3
# Python3 code to demonstrate # the working of isnan() import math # checking isnan() values # with inbuilt numbersprint (math.isnan(math.pi))print (math.isnan(math.e))# checking for NaN valueprint (math.isnan(float('nan'))) |
Output:
False False True
